Control system for load-handling vehicle

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EP 0 592 235 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	10.08.1994 Bulletin 1994/32

(43)	Date of publication A2:
	13.04.1994 Bulletin 1994/15

(21)	Application number: 93308016.0

(22)	Date of filing: 08.10.1993

(51)	International Patent Classification (IPC)⁵: B66F 9/22

(84)	Designated Contracting States:
	DE ES FR GB IT NL SE

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Priority:

09.10.1992 GB 9221304

(71)	Applicant: BOSS GROUP LIMITED
	Leighton Buzzard, Bedfordshire LU7 9SR (GB)

(72)	Inventors:
	Bowman Shaw, Sir Neville Bedfordshire (GB) Turner, Murray Biggleswade Bedfordshire (GB)

(74)	Representative: Richards, David John et al
	PAGE, WHITE & FARRER 54 Doughty Street London WC1N 2LS London WC1N 2LS (GB)

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References cited: :

(54)	Control system for load-handling vehicle

(57) A control system for a lift truck with a telescopic lifting mast is operable to control fluid discharge from the lift cylinders (18, 19) so as to permit a higher lowering speed in the unladen condition than the maximum lowering speed possible in a laden condition. This speeds up load handling operations, especially for container-handling vehicles with tall masts where the time taken to retract the mast is a significant element in the load-handling operation. The control system provides additional discharge conduits (32, 33) and valves (21, 24) which are connected to the lift cylinders (18, 19) when lowering in an unloaded condition.

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